Best Tech Stack for AI Apps
A strong default for AI apps is Next.js, FastAPI, PostgreSQL, OpenAI API, Langfuse, and Vercel. It keeps product velocity high while adding observability for prompt and model behavior.
Who This Stack Is For
Teams building LLM-powered tools, copilots, internal assistants, and AI-first SaaS products.
Why Choose This Stack
- Fast web UI iteration with a mature frontend ecosystem.
- Clear backend boundary for model orchestration and guardrails.
- Better production debugging with AI observability.
When Not to Use It
- You only need a basic chat prototype with no backend logic.
- Your product is mostly offline or on-device inference.
- Your team already has a high-performing Python-only stack.